Firefox 18.0.2 Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:18.0) Gecko/20100101 Firefox/18.0 When opening about:memory, I get the following warning: WARNING: the following values are negative or unreasonably large. canvas-2d-pixel-bytes This indicates a defect in one or more memory reporters. The invalid values are highlighted. Specifically, the value for canvas-2d-pixel-bytes is -22.93 MB A full about:memory?verbose is attached.

I just noticed that there is an earlier RESOLVED:FIXED bug for this for Firefox 9: https://bugzilla.mozilla.org/show_bug.cgi?id=686345

I am seeing a negative canvas-2d-pixels on Nightly 28 (OS X 10.9). I have a memory-report.json if someone wants to look at it. (I would rather not attach it to a public bug report.)

No need for the full memory-report.json, but knowing the actual negative value would be interesting. Thanks.

-15,465,632 B ── canvas-2d-pixels [?!] 1,460,256 B ── gfx-surface-image 76 B ── gfx-surface-quartz 0 B ── gfx-textures 0 ── ghost-windows 384,460,168 B ── heap-allocated 444,452,864 B ── heap-committed 15.52% ── heap-overhead-ratio 0 ── host-object-urls 7,440 B ── imagelib-surface-cache 3,641,344 B ── js-main-runtime-temporary-peak 5,085 ── page-faults-hard 15,573,982 ── page-faults-soft 849,121,280 B ── resident 5,006,364,672 B ── vsize

I am also running into this problem, likely from this website: http://a.singlediv.com/ here's the report. 934,609,720 B (100.0%) -- window-objects ├──596,170,880 B (63.79%) -- layout │ ├──438,671,296 B (46.94%) ── style-sets │ ├───62,677,168 B (06.71%) ── frames │ ├───51,948,376 B (05.56%) ── pres-shell │ ├───13,936,336 B (01.49%) ── pres-contexts │ ├───13,678,720 B (01.46%) ── style-contexts │ ├────8,987,400 B (00.96%) ── rule-nodes │ ├────5,779,120 B (00.62%) ── line-boxes │ └──────492,464 B (00.05%) ── text-runs ├──214,318,496 B (22.93%) -- dom │ ├──128,543,808 B (13.75%) ── element-nodes │ ├───54,367,680 B (05.82%) ── orphan-nodes │ ├───18,939,968 B (02.03%) ── text-nodes │ ├────9,982,736 B (01.07%) ── other │ ├────1,937,920 B (00.21%) ── event-targets │ ├──────546,384 B (00.06%) ── comment-nodes │ └────────────0 B (00.00%) ── cdata-nodes ├──123,180,920 B (13.18%) ── style-sheets └──────939,424 B (00.10%) ── property-tables -11,385,932 B ── canvas-2d-pixels [?!] 76 B ── gfx-surface-quartz 0 B ── gfx-textures 0 ── ghost-windows 2,308,475,136 B ── heap-allocated 2,443,698,176 B ── heap-committed 5.85% ── heap-overhead-ratio 0 ── host-object-urls 7,440 B ── imagelib-surface-cache 9,129,984 B ── js-main-runtime-temporary-peak 40,955 ── page-faults-hard 1,483,215,450 ── page-faults-soft 3,489,673,216 B ── resident 8,656,478,208 B ── vsize

> I am also running into this problem, likely from this website: http://a.singlediv.com/ Thank you for the data. I don't think that site can be the cause because it doesn't use <canvas> elements.

I'm also seeing this on Firefox 32.0, Windows 7. -7.40 MB ── canvas-2d-pixels [?!] 0.00 MB ── gfx-d2d-surface-cache 4.00 MB ── gfx-d2d-surface-vram 9.02 MB ── gfx-d2d-vram-draw-target 1.01 MB ── gfx-d2d-vram-source-surface 0.89 MB ── gfx-surface-win32 0.00 MB ── gfx-textures 0 ── ghost-windows 34.95 MB ── gpu-committed 35.07 MB ── gpu-dedicated 4.98 MB ── gpu-shared 239.84 MB ── heap-allocated 345 ── heap-chunks 1.00 MB ── heap-chunksize 245.76 MB ── heap-committed 345.00 MB ── heap-mapped 2.46% ── heap-overhead-ratio 0 ── host-object-urls 0.00 MB ── imagelib-surface-cache 9.41 MB ── js-main-runtime-temporary-peak 0 ── low-commit-space-events 637.66 MB ── private 644.07 MB ── resident 0.00 MB ── shmem-allocated 0.00 MB ── shmem-mapped 1,157.75 MB ── vsize 1,805.94 MB ── vsize-max-contiguous Application Basics ------------------ Name: Firefox Version: 32.0 User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:32.0) Gecko/20100101 Firefox/32.0 Crash Reports for the Last 3 Days --------------------------------- All Crash Reports Extensions ---------- Name: Adblock Plus Version: 2.6.4 Enabled: true ID: {d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d} Name: Ghostery Version: 5.3.2 Enabled: true ID: firefox@ghostery.com Graphics -------- Adapter Description: NVIDIA NVS 4200M Adapter Description (GPU #2): Intel(R) HD Graphics 3000 Adapter Drivers: nvd3dumx,nvwgf2umx,nvwgf2umx nvd3dum,nvwgf2um,nvwgf2um Adapter Drivers (GPU #2): igdumd64 igd10umd64 igd10umd64 igdumd32 igd10umd32 igd10umd32 Adapter RAM: 512 Adapter RAM (GPU #2): Unknown Device ID: 0x1056 Device ID (GPU #2): 0x0126 Direct2D Enabled: true DirectWrite Enabled: true (6.2.9200.16571) Driver Date: 8-4-2014 Driver Date (GPU #2): 3-20-2014 Driver Version: 9.18.13.4066 Driver Version (GPU #2): 9.17.10.3517 GPU #2 Active: false GPU Accelerated Windows: 1/1 Direct3D 10 Vendor ID: 0x10de Vendor ID (GPU #2): 0x8086 WebGL Renderer: Google Inc. -- ANGLE (NVIDIA NVS 4200M Direct3D9Ex vs_3_0 ps_3_0) windowLayerManagerRemote: false AzureCanvasBackend: direct2d AzureContentBackend: direct2d AzureFallbackCanvasBackend: cairo AzureSkiaAccelerated: 0 Important Modified Preferences ------------------------------ accessibility.typeaheadfind.flashBar: 0 browser.cache.disk.capacity: 358400 browser.cache.disk.smart_size.first_run: false browser.cache.frecency_experiment: 4 browser.places.smartBookmarksVersion: 7 browser.sessionstore.upgradeBackup.latestBuildID: 20140825202822 browser.startup.homepage_override.buildID: 20140825202822 browser.startup.homepage_override.mstone: ignore browser.tabs.drawInTitlebar: false dom.mozApps.used: true extensions.lastAppVersion: 32.0 gfx.direct3d.last_used_feature_level_idx: 0 network.cookie.prefsMigrated: true places.database.lastMaintenance: 1409838205 places.history.expiration.transient_current_max_pages: 104858 plugin.disable_full_page_plugin_for_types: application/pdf plugin.importedState: true print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_bgcolor: false print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_bgimages: false print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_colorspace: print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_command: print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_downloadfonts: false print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_duplex: 1515870810 print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_edge_bottom: 0 print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_edge_left: 0 print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_edge_right: 0 print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_edge_top: 0 print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_evenpages: true print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_in_color: true print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_margin_bottom: 0.5 print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_margin_left: 0.5 print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_margin_right: 0.5 print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_margin_top: 0.5 print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_oddpages: true print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_orientation: 0 print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_page_delay: 50 print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_paper_data: 1 print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_paper_height: 11.00 print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_paper_name: print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_paper_size_type: 0 print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_paper_size_unit: 0 print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_paper_width: 8.50 print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_plex_name: print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_resolution: 1515870810 print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_resolution_name: print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_reversed: false print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_scaling: 1.00 print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_shrink_to_fit: true print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_to_file: false print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_unwriteable_margin_bottom: 0 print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_unwriteable_margin_left: 0 print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_unwriteable_margin_right: 0 print.printer_\\AGO-PRINTERS.ara.wan\VTK_Copy_Room_SHARP_MX-2600N.print_unwriteable_margin_top: 0 privacy.sanitize.migrateFx3Prefs: true storage.vacuum.last.index: 0 JavaScript ---------- Incremental GC: true Accessibility ------------- Activated: false Prevent Accessibility: 0 Library Versions ---------------- NSPR Expected minimum version: 4.10.6 Version in use: 4.10.6 NSS Expected minimum version: 3.16.4 Basic ECC Version in use: 3.16.4 Basic ECC NSSSMIME Expected minimum version: 3.16.4 Basic ECC Version in use: 3.16.4 Basic ECC NSSSSL Expected minimum version: 3.16.4 Basic ECC Version in use: 3.16.4 Basic ECC NSSUTIL Expected minimum version: 3.16.4 Version in use: 3.16.4 Experimental Features ---------------------

Still here in Nightly 51.0a1 on x86_64: -674.62 MB ── canvas-2d-pixels [?!]